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• E3703.1

  Branch Circuits for Central Heating

  • Central heating (other than fixed electric heat) gets an individual circuit; related AC, pumps, valves, humidifiers and air cleaners may share it (NEC 422.12).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3403.2

  Inspection Required

  • New electrical work and affected existing parts are inspected.

  International Residential Code, 2024 · Chapter 34, General RequirementsRead the full text (opens UpCodes in a new tab)

• E3702.11

  Branch Circuits Serving Heating Loads

  • Storage water heaters of 120 gal or less and fixed space heating are sized at 125% of the load; circuits with two or more heating outlets are 30 A max (NEC 422.13, 424.3).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3403

  Inspection and Approval

  International Residential Code, 2024 · Chapter 34, General RequirementsRead the full text (opens UpCodes in a new tab)

• E3907

  Cabinets and Panelboards

  International Residential Code, 2024 · Chapter 39, Power and Lighting DistributionRead the full text (opens UpCodes in a new tab)

• E3404.14.3

  Approved Equipment

  • Otherwise the official may approve reconditioned equipment with documentation of the changes (NEC 110.20(C)).

  International Residential Code, 2024 · Chapter 34, General RequirementsRead the full text (opens UpCodes in a new tab)

• E3801

  General Requirements

  International Residential Code, 2024 · Chapter 38, Wiring MethodsRead the full text (opens UpCodes in a new tab)

• E4202

  Wiring Methods for Pools, Spas, Hot Tubs and Hydromassage Bathtubs

  International Residential Code, 2024 · Chapter 42, Swimming PoolsRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.